Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
Section 8: TSP command reference
DMM7510-901-01 Rev. B / May 2015
8-73
dmm.digitize.analogtrigger.highfreqreject
This attribute enables or disables high frequency rejection on analog trigger events.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Configuration script
Measure configuration list
dmm.OFF
Usage
setting
= dmm.digitize.analogtrigger.highfreqreject
dmm.digitize.analogtrigger.highfreqreject =
setting
setting
0 µs:
dmm.OFF
64 µs:
dmm.ON
Functions
dmm.FUNC_DC_VOLTAGE
dmm.FUNC_RESISTANCE
dmm.FUNC_ACV_FREQUENCY
dmm.FUNC_AC_VOLTAGE
dmm.FUNC_4W_RESISTANCE
dmm.FUNC_ACV_PERIOD
dmm.FUNC_DC_CURRENT
dmm.FUNC_DIODE
dmm.FUNC_DCV_RATIO
dmm.FUNC_AC_CURRENT
dmm.FUNC_CAPACITANCE
dmm.FUNC_DIGITIZE_CURRENT
dmm.FUNC_TEMPERATURE
dmm.FUNC_CONTINUITY
dmm.FUNC_DIGITIZE_VOLTAGE
Details
False triggering around the set analog trigger level may occur with low frequency signals that are
noisy, DC, or have low amplitude and slew rate during the peaks of input sine waves less than
250 Hz. High frequency rejection avoids the false triggers by the requiring the trigger event to be
sustained for at least 64
μs. This behavior is similar to a low pass filter effect with a 4 kHz 3 dB
bandwidth.
When high frequency rejection is on, 64
μs of additional trigger latency is incurred. You may also
need to adjust the trigger levels to ensure that the trigger condition is satisfied for at least 64
μs.
Example
dmm.digitize.func = dmm.FUNC_DC_VOLTAGE
dmm.digitize.analogtrigger.highfreqreject = dmm.ON
Set the measure function to DC voltage
and turn high frequency rejection for the
analog trigger to on.
Also see
(on page 3-64)
dmm.measure.analogtrigger.highfreqreject
(on page 8-120)